Microsoft KB Archive/247130

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XCON: Deleting the MTA from a Routing Group in Active Directory Can Result in MTA Not Starting

Article ID: 247130

Article Last Modified on 2/27/2007


  • Microsoft Exchange 2000 Server Standard Edition

This article was previously published under Q247130


If you are using an Active Directory tool such as Ldp.exe, and the entry for the Microsoft Exchange 2000 Server message transfer agent (MTA) is deleted, an attempt to start the MTA on the particular server causes following error to be recorded in the application event logs on the server:

Source: MSExchangeMTA
Category: Field Engineering
Type: Error
Event ID: 9405
Description: An unexpected error has occurred which may cause the MTA to terminate. Error: Init Routing API returned error -1073478766. [BASE MAIN BASE 1] (16)

The following is an example of an entry for the MTA:

CN=Microsoft MTA,CN=servername,CN=Servers,CN=First Administrative Group,CN=Administrative Groups, CN=OrgName,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DomainName,DC=microsoft,DC=com

NOTE: The above entry has been wrapped for readability purposes and represents the Distinguished Name (DN) for the MTA.


Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.


The error indicates the inability of the routing engine to initialize, and reflects the fact that the MTA that is being started is not a member of any Routing Group.

The MTA can only be deleted by using the Active Directory tools.

Keywords: kbbug kbpending KB247130